A man, believed to be a senior member of the Ulster Defence Association, was killed and three others wounded in a shooting in the docks area of Belfast.
UDA sources said the man was a leading member of the organisation in south-east Antrim.
He and his three companions were in a taxi which was ambushed at 10.15 p.m as they left the ferry port on their way home from yesterday's Glasgow Rangers football match.
A UDA source said the shooting was linked to a bitter internal feud within the UDA which had already left two men dead.
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The PSNI cordoned off the area around the crime scene at the junction of Nelson Street and Great George's Street.
PA